Home / 128,755,891.11-177,680,666.30-70,809,139.11

Finding the Fourth Proportional to 128,755,891.11, 177,680,666.30 and 70,809,139.11

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Solution

The fourth proportional to 128,755,891.11, 177,680,666.30 and 70,809,139.11 is: 97,715,257.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,755,891.11 : 177,680,666.30 = 70,809,139.11 : x
  2. Step 2: Convert to fraction form
    128,755,891.11/177,680,666.30 = 70,809,139.11/x
  3. Step 3: Cross multiply
    128,755,891.11x = 177,680,666.30 × 70,809,139.11
  4. Step 4: Simplify right side
    128,755,891.11x = 12,581,415,016,840,142
  5. Step 5: Solve for x
    x = 12,581,415,016,840,142/128,755,891.11
  6. Step 6: Final answer
    x = 97,715,257.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.